Chapter 15 1. a. What are the three sources of the barriers to entry that allow a monopoly to remain the sole seller of a product? Answer: A key resource is owned by a single firm (monopoly resource), the government gives a single firm the exclusive right to produce a good (government created monopoly), the costs of production make a single producer more efficient (natural monopoly). b.

January 2008 Stop the War on Drugs By Scott Gottlieb, M.D. In December 2005, Eli Lilly pled guilty to a criminal indictment from the Justice Department and paid$36 million in fines and “disgorgement” of its ill-gotten gains. The company’s crime was mounting aconcerted effort to inform doctors that, according to leading medical authorities, the firm’s estrogen-mod-ulating drug Ev